I think that you are definitely in good shape for a great beard. Most, if not all, of us are our own worst critics, and it is easy to think that you won't fill in in certain spots, but you have good coverage and it should all fill in nicely! Also, don't worry too much about the varrying lengths. I made the mistake of carving out cheek and neck lines too soon, more than once, so I have several different stages of growth. It will all catch itself at some point.